Power supply voltage: 3.7V lithium battery. Note: the other Accessories is not included. Due to we sell these small item. All our products will be checked and packaged in good condition before we sent. Please check the parcel before the courier leaves.We will give you a satisfied solution. We will do best to help and provide the best solution to make customers satisfied. Wear, dirt, misused, improper installation, accident. Disassembled or Repaired by unauthorized person. Any damages caused by improper packaging when return the item back to us. Thank you for your understanding and attention. We will also do better and more professional customer service than other sellers. Listing and template services provided by inkFrog. The item "UHF Wireless Instrument Microphone Condenser Mic System 16 Channels for Violin" is in sale since Tuesday, September 14, 2021. This item is in the category "Musical Instruments & DJ Equipment\Pro Audio Equipment\Microphones". The seller is "autoparts-bazaar" and is located in HongKong. This item can be shipped to all countries in Europe, all countries in continental Asia, United States, Canada, Australia.